Improvement in paper-pulp engines



S. L. GOULD.

PAPER PULP ENGINE.

No. 174,805. Pate/med March 14, 1876.

"Wibzesses. pimwnl. 621ml. M (7. M. in?

N. PETERSv FNOYO-LITHOGRAPHEFL WASHINGTON. D C.

UNITED PATENT 7' SIM-EON 'L. GOULD, -OF GARDINER, MAINE.

IMPROVEMENT IN PAPER-PULP ENGINES.

Specification forming part of Letters Patent No. 174,805, dated'March'14, 1876 ;-=app1ication filed May 20, 1875.

To all whom it may conocrm.

Be it known'that I, SIMEoN L. GOULD, of Gardiner, Kennebec county,Maine, have in= vented certain Improvements in Paper-Pulp Engines, ofwhichthe following is aspecification:

This invention has reference to pulp grind ing orrag engines of papermachinery. Its object is to avoid the manyserious objections attendantupon the-method, now universally practiced, of stepping or mounting bothends or journals of the shaft of the rotary grinder in boxes orbearings, such objections being, among others, great friction, rapidwear, and constant liability to derangement .and cloggin g by pulp.

The class of engines upon which my presstruction, as well as themechanical details of the same, will be duly alluded to.

The drawings accompanying this specification represent, in Figure 1, avertical central and longitudinal section of the same. Fig. 2 is avertical cross-section of such engine, taken through the spheroidalcase, and in front of the grinding-head, the annular grinding-bed beingremoved. Fig. 3 is a side elevation; and Fig. 4 is an outer face view ofthe stationary annular grinding-bed.

In these drawings the shell, case, or curb of a pulp-engine is shown atA, as preferably prolate spheroidal in general form, (though this formis not arbitrary,) and placed, in the present instance, with the axis ofthe spheroid in a horizontalplane, will a vertical plane.

e case A may be a circular cylinder in cross-section, and cast inhalves, united at center by bolts passing through flanges, or it may beformed with a flattened top, covered by a plate, to enable readyaccessto be had .to its interior.

Upon the-head or one end a of the 'shell or curb A I aftix a horizontalbracket orstage, B, centrally, upon which, and of the case A, I erect abox,or bearing, 0, in which the outer end ofa horizontal shaft, D,rotates, the means I and terminates at the inner-face of such head,where it .is secured in any proper manner, centrally, to the rear andouter side of an interiorly concave or frusto-conical head or stock, I,which is arranged axially with respect to the shaft D and case A,andrevolves with such shaft. The inner wall or'periphery of the flaringhead I is armed with a series of grinding blades or knives, b b, 800.,which extend from a point near the axis of such head outwardly to itsperiphery; and these blades may be disposed radially or tangentially ofthe head, according to circumstances, and the manner in which they areto cut. J in the accompanying drawings represents a conoidal or taperingscrew or worm which is disposed centrally within the head I, and issecured to or constitutes a prolongation of the inner endof the shaft D,the purpose of this worm being to pre 'ent stagnation and eddy of thestuff within the case, and accelerate the circulation of such stuff bythrowing it off and outward to the periphery of the head, in addition tothe force exerted. to produce this result by the centrifugal action ofthe revolutions of such head.

The fellow and stationary grinder, which operates with the revolvinghead I to reduce, disintegrate, and separate the fibers of the stock, byobtaining two grindingrsurfaces, be-

tween which such action is produced, is shown at K as an annular bed ordisk in the form of a hollow conic frustum, whose exterior taperingsurface or periphery corresponds to the interior of the head I, and issupplied with a series of grimling-blades, c c, &c., as shown in Fig.4ot' the drawings, these blades being shown in the present instance asarranged.

the stock, which is highly effectual, and also increasing thecentrifugal force exerted upon such stock by the rotations of the head.

The annular or open bedK is supported from the top of the curb A, in anysuitable manner, to obtain great. rigidity and strength of parts, and,as will suggest itself to the minds of goodmechanics, may he stayed atbottom, if desirable; but in any event a free and unobstructed spaceexists in front of it, and between it and the opposite pole or center eof the said curb. This last-named pole e of the curb A is an apiculateddeflector, which extends a short distance axially into the interior orgrinding chamber of suchcurb, and by deflecting or throwing ofl' towardand into the center of the grinding-bed the stuff in the engine aidsvery materially in maintaining anefl'ectual circulation of such stuffthroughout the circuit of the chamber.

'In addition to dispensing with the outer end bearing of the shaft D, myengine presents a wide variation from others of its class, in that itsgrinding-surfaces are arranged and revolve in a vertical plane in lieuof a horizontal plane, as heretofore; and it is available, with someadditions or removals, equally for beating and washing, as no arms orobstructions present themselves; and I am enabled to produce pulp of anylength of fiber desired.

I avoid the thrusts, strains, great friction, and wear, and danger ofmisplacement now attendant upon stepping the outer or lower end of theshaft D in a bearing, and I avoid also the stagnation and eddy of thestock about such step, and the accumulation of stones, pieces of iron,or other foreign injurious substances, which would result in much harm.i

The operation of this engine in grinding and beating stock is asfollows-it being presumed that the engine has been previously furnished1 The rotation of the head I produces a centrifugal action, whichinduces a powerful and continuous current or circulation of the stock inthe directions shown bythe arrows in Fig. 1 of the drawings-that is,pass between the head I and annular bed K, and is acted upon by theknives, with which these parts are armed. Thence the stock is thrown offoutwardly from the periphery of the head and bed against the innerperiphery of the case A, and toward and againstthe deflector e, by whichthe current is deflected in a reverse direction into and through thecenter of the bed K, and again between the grinding-surfaces, theconical screw J acting to draw the stock inward, and, as before stated,preventing stag- A and annular bed K, aided by the screw J and deflectore, effectually prevent settling. and accumulation of stock at the bottomof the said case, and a lively circulation throughout the entire circuitof the case is at all times apparent.

The grinding-head Iis to be fed toward or away from the bed-K-bysuitable means, and other details are to be added to the engine whichare not shown herein, as they embody nothing peculiar to my presentimprovements.

I do not confine myself to the precise form of the case A, or of thehead I and annular bed K, as herein illustrated, as these may bedeparted from to a considerable extent.

Manifestly a modification of my invention.

would be to transpose the relative positions of the rotary grinder andgrinding-bcdthat is, the ring or female grinder may be stationary, andthe male grinder revolve within it, as shown in Fig. 5 of theaccompanying drawings, which is a section of such a modification. Inthis case, as in the former, a continuous circulation throughout theshell or case A is maintained by centrifugal force generated by therevolving male grinder. In this construction, however, the two grindersare necessarily longer than in the former, and a shaft hearing withinboth ends of the case A will probably be desirable, if not necessary.

Having thus described my invention. I claim as such, and desire tosecure by Letters Patent, the following:

1. The combination, with the case or curb and the stationary annulargrinding-bed, of the rotary grinder and its SUPDOIlDiIlg-Silitft, whichtakes its hearing at one end only of the case, and terminates in therotary grimler, substantially as shown and set forth.

2. The stationary annular grinding-bed and rotary grinder, incombination with the screw or worm attached to and revolving with therotary grinder, and extending into the opening in the stationary annulargrinding-bed, substantially as shown and set forth.

3. In combination with a rotary grinder, a stationary annulargrindfl'ig-bed, arranged within the case, substantially as described,whereby a space is left between it and the end of the case opposite tothat in which the drh'ingshaft of the rotary grinder is supported, andhaving an unobstructed opening through its center, or thereabout, topermit free circulation and passage therethrough of the stock to andbetween the grinding-surfaces, substantially as set forth.

4. The stationary annular grinding-bed, the rotary grinder, the axialworm or screw, at tached to and moving with the rotary grinder, ane thedeflector c, said parts being arranged together within the case or curbfor joint operation, substantially as shown and described.

SIMEON L.-GOULD. Witnesses:

F. CURTIS, W. E. BOARDMAN.

